Lock



mmh 24.1925. A 1,530,672.

` I c. HoFFMAN tinck y Fil'ed Oct. 9. 1922 {Sheets-Sheet 4 Patented Mal, 24, i925.

eteamz UNI-reo STATES PATENT oFFicE.

noci

vention,` such asivill enable others'- skilled in"v lthe art to which it appeitazins to make and use the-same.

My invention relates to .locks lordoors and more particularly to one. wherein a latch is employed in conjunction with a bolt, the

primary object of my invention bei-ng to provide a simple and'- effective `means'fitor la-tcliing and' locking a door, such means in! cluding improvedy elements so arranged as to be operable for latching'. a vdoor to `e'nallle manipulation of tlielatchfto be effected by the usual knobboth from the fastening device of this character whereby the door may be automatically .locked by its' bolt when the" latch is moved from llatcliingl engagement with-the striker plate.r

Another object of the invention is the provision1 in connection with a lock of this character of an improved striker plate whereby the door may be slammed closed and locked even though the dead bolt be in protracted position. l i

The invention further; comprehends" a fastening device of this kind' wherein the deadbolt may be set in aimannerto prevent manipulation by a" key from theV outside of the door or operationtthe construction of thezdevi'ce be` ingsuchV that operatio'irof` the bolt fro'mfth linside must necessarily be` precededl b-y the turning of a fixed key.

in the drawings, Figa-re 1 is a.' view,-

1 showingV theV latch retractedfand the' bolt protracted.

a' i detail' perspective viewfof the-latch. Y,Figi-y ure Gisa detail perspectiveviewiofithe conherebydecla'rje the' following to be' inside andvoutside. The invention also contemplates a door' in" a manner to perii't such key Figi urey 2 is a sectional view on line 2-"2lFigure' 1. Figure 3 is a" view similar toi-Figure Figui-e 4 is' aV perspective of a; preferredl'fornifof striker plate;- Figure` 5i is applic-maimed oci-aber 9,1522. seri'al No. 593,282'. j

ma piane, Figa-fe 71S View maar lo rig ure l showing the control plate disengaged. from the latch and the boltI setas against key manipulation from the outside. Figure 8 is a sectional View on line SS, Figure?. Figure 9 is a perspective view of the lock housing` with the inner plateremoved.` Figure; 10 is a sectional `view onv line 10-10, Figurel. Figure-11 is a cross sectional View on line 11441, Figure 10. Figure 12 is a detail of the` operating lever.

1 designates the lock housing including the edge plate with the usual lock and latch apertures', front and back plates and neces# spacing posts, together with key holes, and at 2 I have shown alatch normally ,protractedl .by a` spring 3i and operable against the tension of the spring by a two arm lever et, the hub 5 of lthe lever being arranged to receive thesquared ends of the inner and outer knob spindles 6 and?, respectively.V The supporting platev 8 of the latch is bent at right angles .along itsinner edge to term allang-e 9 with which the leverai'm'dV engages; Projecting laterally from the plate 8 is a` stud 10 which forms a connection between thelat'cliV and the control platel l2 through slot-13 of the latter. This control plate 12 is loosely pivoteduon the lock casr ing, as atll and has a downwardly extendiiig tongue 1,5 adapted to engage withv the dead bolt-17, and a cut away portion 18 with the pin 10 acts as a stop to prevent manipulationl of tlie parts when the latch and bolt are both protracted. `The outer tace of the control plate 12 has af thickened portion 19 whichis tapered oil' at its edges as at 2O and 20 for a purpose to be hereinafter explained.. Axspring 21 on the inner face of the removable plate of' the lock housing4v bears on the control platel2 and' tends to hold-'itin position to engage the stud 10.

The deadboltil? isheldin' itsprotracted posit-ion', as shown* in` Figurev 8,;by spring actuated vtiiinblers v22, aflateral extension 23 ci. the bolt taking in' alin'ed' out outsi24foi; The inner lend of the' bolt has Aa recess" 25 iin which the tongue 15 of the control plate is designed to fit. g f t 30 Thavesfho'wn af striker plate fitted tothe outer casingv of the doorway and havf' ing? openings to receive the latch and bolt- Thebolt opening is provided with a filler plate 31, hinged at one end to theouter edge of said opening, and being under spring tension as clearly shown in Figs. 2, Il and 8, this filler plate 31 being adapted to nearly fill the bolt opening as shown in Figs. 2. and

8 from which views it will also be observed that the bolt opening ofthe striker plate is extended to a point in proximity tothe outer edge of the plate.

opening for receiving the latch 2 in the upper part of said striker plate 30 is relatively narrow, a thickened portion being provided adjacent said last-mentioned opening toward the outer edge of said plate against which the latch 2 is adapted to Wipe in moving toward its opening, it being noted that the outer edge of this thickened portion is beveled as sho-wn in Fig. l: so as to retract the latch and permit it to slide into said opening. The inner edge of this thickened portion serves to provide av greater bearing surface for the latch 2 when iny its opening and also renders picking of the latch more dificult. i

The purpose, of this iiller `plato31 is to prevent injury to the bolt 17 or striker plate 30 and to assure locking of the door yshould it be shut with thebolt 17 protracted, the plate giving as the bolt strikes against it in t-he closing movement.. It will be understood that the end of dead bolt 17 will encounter no obstructions before striking the filler plate-31. This is due to the fact that the bolt opening of the striker plate 30 is exf tended `outwardly' to meet the bolt and that Figure 1 the latch and bolt are coupled by the control plate 12 and `turning of the lever 4 by manipulation of the spindle from either inside or outside will cause retraction ofthe latch2 and at the same time protraction of the dead bolt17. This isi accomplished by the control plate 12 turning on its pivot `1li: through the action of the stud 10 working in the slot 13of the plate andr the tongue 15 engaging the .left hand wall of the recessy of the dead bolt vwhich forces the latter outwardl, the bolt being free to be shot. When so protracted the tumblers 22 will lock the bolt in this position by the engagement of the exten` S1011 23 with the cut outs 24. So locked, the

On the other hand thelatch is held in its retracted position, as

shown in Figure 3. To withdraw the bolt it is necessary to first disengage the tuin- V blers from the dead bolt and this is donc by turning downwardly the inside fixed key 10,7011 an outside removable key inserted through the key hole 41, to engage the tuinblers and .Kforce them yfrom the position where' the lateralextension 23 of the boltV is in the cut outs 24:. This allows the springs 3 to act on the latch and force it outwardlyywhichicauses the control plate to turn on its pivot and retract the bolt. The parts are now --back in the position of Figure 1, and in order to withdraw the latch without again protracting the bolt, either key is given a turn in the opposite direction' from the first movement which causes it to engage one or the other ofthe tapered edges 2O or 20 according to which key is used, of the control plate 12 and then the thickened portion 19 Wit-hthe result that the control plate 12 will-be forced laterally against the tension of spring 21 and disengaged from the stud 10.k vTurning of the removable key in the direct-ion opposite to its movementto lift `the control plate 12 will cause it 'to engage and move the lower arm of the lever to retract the latch.

Or, with the parts in the position stated, turningof one or the other of the spindleswill then .retract the latch. Reverse movement of the key allows the spring to force the vcontrol'plate back toits original position where the studV will engage the slot when the latch is released and returned to its normal position by its spring 3. It is manifest thatthe fixed key 40 may be left in position to keep the control plate out of engagement with the'latch so that the door may be opened and closed in the usual'manner from inside-or loutside by merely tuin' ing the knob.

'If it be desired to have both the latch and the bolt in engagement with `the'door casing, through the striker plate, it is'only necessary to protract the bolt as before described by the movement of the latch from the position shown in Figure 1l to that shown in Figure 3 and to then turnt-he key 10 upwardly so as to move the control plate 12 from the position where vstud 10 is Y in thefslot13y which willV vallow the spring 3 toact on the latch 'and force it into the' position where both the latch and bolt are protracted,fas shown in Figure 7. In thisv position the stud 10 cooperateswith the cut Y away portion 18 of the control plate to lock the'latch against retract-ion other than by key action; To open the door from the outside with the partsas shown in Figure 7 it is first necessary to turn the outside key into engagement with the thickened portion ofA the v.control plate so as to disengage it from its locking cooperation with the latch lll) latch, a lever for- Leadersand to then turn the knob. If the inside lcy has been turned down releasing the plate 'l2 the latter willl be iorced by its spring into a position where its slot 13 will engage the pin '.10 oi the latch andupon release `ot the knob the latch will. again niovc outa/arch 'forcing the bolt out ot" the locking position. Manifestly, iiE the key l() be turned up into engagement; with the control plate when thc outside key is operated there can be no retraction of the bolt 17, notwithstanding' the latch may be moved. lit the pers-on entering the house wishes to set both latch andloclr for manipulation by another outside it is necessary that he again turn the key i0 so as tov disengagethe plate 12 from` the pin to allow the latch to be protracted since when it has become coupled with the plate l2 and the door closed it is forced int-o the position shown in Figure 3.

It is to be noted that when thc latch and bolt are coupled, with the stud l in the slot-13 of the control plate. the moven'ients of the latch and bolt are in opposite directions.

It is manifest that it the parts are in the position shown in Figures 3 and 7 before the door is closed, any slamming of the door will effect a.V locking, the bolt 17 engaging the Filler plate Blas it moves to closing position and forcing such plate against the tension of the spring, the plate assuming its normal position after the door is fully closed.

I claimas my invention:

l. A lock including a case, a-spring held latch, a lever for retracting said latch, a tumbler controlled bolt, means coupling said latch and said bolt whereby the bolt will be moved in an opposite direction to that of the latch, and means rendering said last mentioned means ineffective.

2. A lock including a case, a spring held retracting said latch, a tumbler controlled bolt, a control plate hav ing a portion engaging said latch and another portion engagingsaid bolt whereby the latter will be moved in an opposite direction to that of the latch, and means tor disengaging said control plate from said latch to permit actuation of said latch without moving said bolt. ,t

3. A lock including a case, a spring held latch having a stud, a lever for retracting said latch. a tumbler controlled bolt, a control plate having a slot to receive the stud of said latch and also having a portion engagthe latter will be moved in an opposite direction to that of the latch, and means cooperating with said con.

trol plate to disengage it from said latch to permit-actuation of the latter without moving said bolt. p 4

l. A lock including a case', spring' held latch havinga stud, a llever for retractingy saidl latclna tumbler' controlled bolt having a recess, control' plateV having a` slot to receive the stud of said latch and` also` having a tongue engaging the recess of said bolt whereby the latter will bemoved in anfoppo- 5. A lock including a case, a spring held latch, a leverv for retracting said latch, a tumbler controlled bolt, a control plate hav inga portion engaging ksaid latch and another kportion engaging said bolt whereby the latter will be moved in an opposite di'- rection to that ot the latch, said control plateV having a thickened portion, and means engaging said thickened portion of said control plate to move it from engagement with said latch to prevent movement of said bolt by actuation of said latch.

6. A lock including a case, a spring held latch, a lever for retracting said latch, atum bler controlled bolt, a control plate coupled with said latch and said bolt whereby the latter is protracted when said latch is retracted, means for disengaging said control plate from said latch to permit protraction of the latch, and means cooperating with said latch for locking it and said bolt protracted.`

7. A lock Vincluding a case, a spring heldl latch having a stud, a lever for retracting' said latch, a tumbler controlled bolt, a control plate having a slot to receive thestud of said latch and a out awayY portion, said control plate being coupled with said'bolt whereby the latter will be moved in an opposite direction to 'that of the latch, and means cooperating with said control plate to 'disengage its slotted portion from said stud to allow said latch to be protracted without' moving said bolt and causing the stud of said latch to engage the cut away portion of said plate to lock said latch and bolt in protracted position. Y

8. A lock including a case, aspringheld latch having a stud, a lever tor retracting said latch, a tumbler controlled bolt, a control plate having a slot to receive the stud of said latch and La cut away portion, sa'id control plate beingcoupled with said bolt wherebyv the latter will be moved in an opposite Vdirection to Vthat of the latch', and

means with which a key is designed to coop- 'crate to disengage said control plate from its dii'erent positions of engagement with the stud of said latch to permit said latch'to be protracted or retracted without moving said bolt. i i

9. VA lock including a case, a spring heldV` latch having a stud, a lever for retracting said latch, a tumbler controlled bolt, a con trol plate having a slot to receive the stud of said latch and cut away portion, said control plate jbeing coupled with said bolt whereby the latter Will be moved in an opposite direction to that ofthe latch, a springA acting on said control plete, and means with which a key is designed to cooperate to force `seid control plate against the tension of its spring from the different lpositions of engagement with the stud of said latch to permit said latch to be protracted or retracted, Without moving said bolt.

n testim0n57 whereof I have signed this specification.

CARL. HOFFMAN. 

